A shell script to read the IP adress of a USB connected Android device and automatically re-connect to it via wireless ADB.

adb-reconnect.sh

# A command line utility for automatically connecting ADB (Android Debug Bridge) to a USB connected Android device

# Records the status of the wifi interface on the device
adb shell ifconfig wlan0 > line
if [ "$?" -gt 0 ]
then
	echo "Couldn't read IP address from device.  Is it connected via USB?"
	exit 1
fi

# Parses the IP address from the status
IP_ADDRESS=$(awk '{ print $3 }' line)
if [ "$IP_ADDRESS" == "assign" ]
then
	echo "Couldn't access wireless interface.  Is the device connected to wifi?"
	rm line
	exit 2
fi

rm line

#Restart ADB in wireless mode
adb tcpip 5555

echo $IP_ADDRESS

#ADB won't connect wirelessly if there is a USB device attached
read -p 'Disconnect your device and press [Enter] to re-connect wirelessly.'

#Connect to the device using the parsed IP address
adb connect $IP_ADDRESS